121540244430 has 192 divisors, whose sum is σ = 338806540800. Its totient is φ = 27805536000.

The previous prime is 121540244429. The next prime is 121540244461. The reversal of 121540244430 is 34442045121.

It is a super-2 number, since 2×121540244430² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 18549655 + ... + 18556205.

It is an arithmetic number, because the mean of its divisors is an integer number (1764617400).

Almost surely, 2^121540244430 is an apocalyptic number.

121540244430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 121540244430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169403270400).

121540244430 is an abundant number, since it is smaller than the sum of its proper divisors (217266296370).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121540244430 is a wasteful number, since it uses less digits than its factorization.

121540244430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6871 (or 6860 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

Adding to 121540244430 its reverse (34442045121), we get a palindrome (155982289551).

The spelling of 121540244430 in words is "one hundred twenty-one billion, five hundred forty million, two hundred forty-four thousand, four hundred thirty".